{
  "edition": "08",
  "date": "2026-10-20",
  "status": "Preliminary design; no apparatus procured or qualified",
  "currency": "USD",
  "assumptions": {
    "intercepted_power_W": 2,
    "mirror_reflectance_ideal": 1,
    "lever_arm_m": 0.1,
    "inertia_kg_m2": 0.002,
    "period_s": 100,
    "optical_lever_length_m": 1,
    "window_sigma_nN": 1,
    "windows_total": 280,
    "linearity_check_W": 1
  },
  "uncertainty_allocations_nN": {
    "optical_prediction": 0.40027691423778244,
    "force_calibration": 0.6671281903963041,
    "statistical_mean_difference": 0.11952286093343936,
    "thermal_residual": 0.15,
    "electrostatic_residual": 0.08,
    "gas_residual": 0.08,
    "mechanical_residual": 0.08
  },
  "budget_basis": "Analyst planning allowances, not vendor quotes, market averages or a committed budget. Purchase only after specification and interface review. Includes custom work; no borrowed laboratory assumed.",
  "budget": [
    {
      "name": "External laser, control and attenuation",
      "low": 10000,
      "high": 25000
    },
    {
      "name": "Optical power metrology, optics and position readout",
      "low": 8000,
      "high": 18000
    },
    {
      "name": "Custom balance, suspension and electrostatic calibration",
      "low": 8000,
      "high": 20000
    },
    {
      "name": "Vacuum chamber, dry pumping, gauges and feedthroughs",
      "low": 15000,
      "high": 35000
    },
    {
      "name": "Isolation table, environmental shielding and fixtures",
      "low": 8000,
      "high": 18000
    },
    {
      "name": "Acquisition, electronics and optional lock-in",
      "low": 6000,
      "high": 15000
    },
    {
      "name": "Temperature instrumentation and matched-heater controls",
      "low": 3000,
      "high": 8000
    },
    {
      "name": "Beam enclosure, interlocks and commissioning protection",
      "low": 4000,
      "high": 10000
    },
    {
      "name": "Engineering, calibration and independent review services",
      "low": 15000,
      "high": 40000
    }
  ],
  "contingency_fraction": 0.25,
  "excluded": "Facility lease/build-out, staff salaries, taxes, freight/import duties, operating utilities, graphene fabrication and mid-IR upgrade, legal/IP costs, repeated redesign and flight hardware. Avoid double-counting electronics already supplied in a selected instrument.",
  "options": [
    {
      "name": "Coherent Mephisto family / 1064 nm (range reference)",
      "role": "Supplier discussion only; primary-power headroom unresolved",
      "source": "https://www.coherent.com/lasers/cw-solid-state/mephisto",
      "verified": "Manufacturer lists 0.5, 1 and 2 W options at 1064 nm.",
      "price": "Quote required; no current public price verified.",
      "condition": "The listed 1 W option cannot meet the primary point. Even 2 W nominal output may fall short after optical losses. Request a source configuration that demonstrably delivers 2 W at the mirror with margin, calibrated attenuation and low-frequency drift data. No specific source is selected."
    },
    {
      "name": "Thorlabs S405C thermal sensor + compatible console",
      "role": "Intercepted-power calibration candidate",
      "source": "https://www.thorlabs.de/newgrouppage9.cfm?objectgroup_id=3333&pn=S305C",
      "verified": "Manufacturer family page lists S405C: 0.19\u201320 micrometers, 100 microwatts\u20135 W, 10 mm aperture.",
      "price": "Quote required; current price and supply status not verified.",
      "condition": "Confirm exact current sensor/console compatibility, calibration uncertainty at 1064 nm, beam interception and thermal response. Its power range does not establish our uncertainty target."
    },
    {
      "name": "Newport isolated optical platform",
      "role": "Isolation candidate",
      "source": "https://www.newport.com/g/isolated-platform-selection-guide/",
      "verified": "Manufacturer selection guide covers isolated platforms.",
      "price": "Quote required for dimensions, load and measured isolation requirements.",
      "condition": "Size only after chamber footprint and total load are frozen. Specify ambient floor spectrum; table damping alone does not reject building tilt."
    },
    {
      "name": "Edwards nEXT85-based dry pumping system",
      "role": "Pressure-control candidate",
      "source": "https://digitalbrochure.edwardsvacuum.com/nEXT-TURBOMOLECULAR-PUMPS/en/technical-specifications.html",
      "verified": "Manufacturer technical tables list nEXT85 and recommended backing-pump options including nXDS6i.",
      "price": "Quote required for a complete compatible system.",
      "condition": "Chamber conductance, leaks, gauges, materials and outgassing determine pressure. Pump speed is not a pressure specification. Mechanically decouple pumping vibration."
    },
    {
      "name": "Zurich Instruments MFLI",
      "role": "Optional modulation and transfer-function instrument",
      "source": "https://www.zhinst.com/ch/en/products/mfli-lock-in-amplifier/",
      "verified": "Manufacturer lists DC\u2013500 kHz base bandwidth and a 5 MHz upgrade.",
      "price": "CHF 6,290 displayed on the Swiss regional page; ex-works Zurich, region-specific. Observed 20 October 2026. Not a US delivered quote and not converted into the USD budget.",
      "condition": "Do not buy the upgrade for a slow torsion experiment without a demonstrated need. Retain raw time records; lock-in magnitude alone cannot establish force sign or reject coherent heat artifacts."
    }
  ],
  "acceptance": {
    "expanded_relative_max": 0.15,
    "coverage_factor": 2,
    "stretch_relative": 0.1,
    "status": "Draft; requires independent design review and registration before confirmatory acquisition"
  }
}